Enhanced photocatalytic hydrogen generation and photostability of ZnO nanoparticles obtained via green synthesis

Archana, B.; Manjunath, K. R.; Nagaraju, G.; Sekhar, K. B. Chandra; Kottam, Nagaraju

doi:10.1016/j.ijhydene.2016.11.099

Cited by 67 publications

(15 citation statements)

References 53 publications

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“…Despite the ZnO NPs’ size and shape in the solution applied in the field experiment, it is quite likely that ZnO NPs undergo gradual photo-corrosion when exposed to sunlight on the leaf surfaces [43], and therefore, the nanoparticle input to plants from leaves and the related physiological effects are a little different to those in the zinc-based ionic form Zn (2+) and micro-particle foliarly applied fertilizers [17].…”

Section: Resultsmentioning

confidence: 99%

Effect of Foliar Spray Application of Zinc Oxide Nanoparticles on Quantitative, Nutritional, and Physiological Parameters of Foxtail Millet (Setaria italica L.) under Field Conditions

et al. 2019

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It has been shown that the foliar application of inorganic nano-materials on cereal plants during their growth cycle enhances the rate of plant productivity by providing a micro-nutrient source. We therefore studied the effects of foliarly applied ZnO nanoparticles (ZnO NPs) on Setaria italica L. foxtail millet’s quantitative, nutritional, and physiological parameters. Scanning electron microscopy showed that the ZnO NPs have an average particle size under 20 nm and dominant spherically shaped morphology. Energy dispersive X-ray spectrometry then confirmed ZnO NP homogeneity, and X-ray diffraction verified their high crystalline and wurtzite-structure symmetry. Although plant height, thousand grain weight, and grain yield quantitative parameters did not differ statistically between ZnO NP-treated and untreated plants, the ZnO NP-treated plant grains had significantly higher oil and total nitrogen contents and significantly lower crop water stress index (CWSI). This highlights that the slow-releasing nano-fertilizer improves plant physiological properties and various grain nutritional parameters, and its application is therefore especially beneficial for progressive nanomaterial-based industries.

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Section: Resultsmentioning

confidence: 99%

Effect of Foliar Spray Application of Zinc Oxide Nanoparticles on Quantitative, Nutritional, and Physiological Parameters of Foxtail Millet (Setaria italica L.) under Field Conditions

et al. 2019

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“…[ 2 ] A photocatalytic H 2 generation system should be photoactive, catalytically active, and stable. Many semiconductor materials such as zinc oxide, [ 3 ] titanium dioxide, [ 4 ] organic dyes, [ 5 ] and graphitic carbon nitride (g‐C 3 N 4 ) [ 6 ] have suitable energy band edges and are thus photoactive to perform light‐harvesting function, but the high overpotentials make them kinetically inert for H 2 evolution. On the contrary, many metals and metal complexes such as platinum (Pt), [ 7 ] palladium, [ 8 ] cobalt, [ 9 ] manganese dioxide, [ 10 ] ruthenium, [ 11 ] and Pt(II) complexes [ 12 ] are less photoactive but catalytically active and have low overpotentials for molecular activation.…”

Section: Introductionmentioning

confidence: 99%

Solar‐Driven Hydrogen Generation Catalyzed by g‐C₃N₄ with Poly(platinaynes) as Efficient Electron Donor at Low Platinum Content

et al. 2021

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A metal‐complex‐modified graphitic carbon nitride (g‐C3N4) bulk heterostructure is presented here as a promising alternative to high‐cost noble metals as artificial photocatalysts. Theoretical and experimental studies of the spectral and physicochemical properties of three structurally similar molecules Fo–D, Pt–D, and Pt–P confirm that the Pt(II) acetylide group effectively expands the electron delocalization and adjusts the molecular orbital levels to form a relatively narrow bandgap. Using these molecules, the donor–acceptor assemblies Fo–D@CN, Pt–D@CN, and Pt–P@CN are formed with g‐C3N4. Among these assemblies, the Pt(II) acetylide‐based composite materials Pt–D@CN and Pt–P@CN with bulk heterojunction morphologies and extremely low Pt weight ratios of 0.19% and 0.24%, respectively, exhibit the fastest charge transfer and best light‐harvesting efficiencies. Among the tested assemblies, 10 mg Pt–P@CN without any Pt metal additives exhibits a significantly improved photocatalytic H2 generation rate of 1.38 µmol h−1 under simulated sunlight irradiation (AM1.5G, filter), which is sixfold higher than that of the pristine g‐C3N4.

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“…On the other hand, ZnO nanoparticles synthesized by solution method have been studied for visible light-assisted photo-catalytic hydrogen generation besides other applications for photodetection, solar cell application and sensing [9,10]. In this work, Laser ablation in a liquid medium has been adopted to synthesized ZnO nanoparticles.…”

Section: A Case Studymentioning

confidence: 99%

ZnO Nanoparticle Synthesis using Nd, Yag Laser for Increasing Hydrogen Fuel Cell Performance

Majeed¹,

Tjprc²

2018

IJMPERD

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In this work, the hydrogen evolution reactions on stainless steel electrodes in ultra-pure water (UPW) and water-based Zinc oxide colloid solutions have been investigated. Ultra-pure water with electrical conductivity (0.45µs) was used to synthesize ZnOnano colloidal using pulsed laser ablation of zinc metal in water. All experiments were performed using a Q-switched Nd-YAG laser operating at fundamental mode 1064nm with 9ns pulse duration, at fixed laser output energy (750mJ). Different number of pulses (250, 500, 750 and 1000) was applied with the aim to affect the concentration of synthesized ZnO colloidal. AFM micrograph of nano-colloidal was revealed that the synthesized nanoparticles have a spherical shape with average diameters about25nm. The pH and electrical conductivity values of all solutions were measured simultaneously at room temperature. Hydrogen generator-fuel cell driven by 30 volts as input source is developed with ZnO nanocolloidal. PH variation is within range 7-8.1 and electrical conductivity variation is 0.45-15.8 µs/cm. The optimum ZnO NPs concentration of pH 8.1 and electrical conductivity 15.8µs/cm has been observed, which gives the maximum H 2 /O 2 output of 1.2 mL/s.

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Enhanced photocatalytic hydrogen generation and photostability of ZnO nanoparticles obtained via green synthesis

Cited by 67 publications

References 53 publications

Effect of Foliar Spray Application of Zinc Oxide Nanoparticles on Quantitative, Nutritional, and Physiological Parameters of Foxtail Millet (Setaria italica L.) under Field Conditions

Effect of Foliar Spray Application of Zinc Oxide Nanoparticles on Quantitative, Nutritional, and Physiological Parameters of Foxtail Millet (Setaria italica L.) under Field Conditions

Solar‐Driven Hydrogen Generation Catalyzed by g‐C₃N₄ with Poly(platinaynes) as Efficient Electron Donor at Low Platinum Content

ZnO Nanoparticle Synthesis using Nd, Yag Laser for Increasing Hydrogen Fuel Cell Performance

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Enhanced photocatalytic hydrogen generation and photostability of ZnO nanoparticles obtained via green synthesis

Cited by 67 publications

References 53 publications

Effect of Foliar Spray Application of Zinc Oxide Nanoparticles on Quantitative, Nutritional, and Physiological Parameters of Foxtail Millet (Setaria italica L.) under Field Conditions

Effect of Foliar Spray Application of Zinc Oxide Nanoparticles on Quantitative, Nutritional, and Physiological Parameters of Foxtail Millet (Setaria italica L.) under Field Conditions

Solar‐Driven Hydrogen Generation Catalyzed by g‐C3N4 with Poly(platinaynes) as Efficient Electron Donor at Low Platinum Content

ZnO Nanoparticle Synthesis using Nd, Yag Laser for Increasing Hydrogen Fuel Cell Performance

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Solar‐Driven Hydrogen Generation Catalyzed by g‐C₃N₄ with Poly(platinaynes) as Efficient Electron Donor at Low Platinum Content